Doppler-shifts
the frequency of input light by an amount equal to the RF drive
frequency, but is optimized specifically for this purpose. Typically our
frequency shifters will use the anisotropic interaction of the slow
shear mode in tellurium dioxide (TeO2). Applications such as
interference-based optical techniques require a high extinction ratio
between the diffracted and undiffracted beam; this can be achieved with
a high-quality optical finish to minimize optical scatter.
We offer standard products with frequency shifts of 40-350 MHz, many of
which can be operated in double-pass configurations. In addition we can
design for custom frequency shifts where required. Frequency shifters
are fabricated using high quality TeO2, grown and polished in-house, for
lowest insertion loss and excellent power handling. Other acousto-optic
materials are available and may be more appropriate for some
applications.
TeO2 based frequency shifters are highly efficient acousto-optic
devices, requiring very low drive power to achieve the desired frequency
shift. Our designs consume minimal power (generally <100 mW power draw),
often allowing us to package the driver with the AOFS for a more compact
and power-efficient solution.

Our standard models are below:

Model

Wavelength

Operating Frequency

Active Aperture

Integrated Driver

Optical Material

I-M110-3C10BB-3-GH27

300-400 nm

110 MHz

3.0 mm

No

Crystal quartz

AOMO 3080-125

415-900 nm

80 MHz

2.0 mm

No

Tellurium dioxide

AOMO 3100-125

440-850 nm

100 MHz

1.5 mm

No

Tellurium dioxide

AOMO 3200-125

470-690 nm

200 MHz

1.5 mm

No

Tellurium dioxide

I-FS040-1.5S2C-3-GH83

532 nm

40 MHz

1.5 mm

No

Tellurium dioxide

I-FS040-1.5S2C-1-GH66

532 nm

40 MHz

1.5 mm

Yes

Tellurium dioxide

I-FS080-3S2E-1-GH39

633 nm

80 MHz

3 mm

Yes

Tellurium dioxide

I-FS080-3S2E-3-LG5

633 nm

80 MHz

3 mm

No

Tellurium dioxide

I-FS040-2S2E-1-GH66

630-690 nm

40 MHz

2 mm

Yes

Tellurium dioxide

I-FS040-2S2E-3-OL3

630-690 nm

40 MHz

2 mm

No

Tellurium dioxide

AOFS 4040-191

633-1064 nm

40 MHz

2x6 mm

No

Tellurium dioxide

I-FS080-2S2G-3-LV1

1064 nm

80 MHz

2 mm

No

Tellurium dioxide

I-FS040-2S2J-3-GH53

1550 nm

40 MHz

2 mm

No

Tellurium dioxide

I-M040-2C8J-3-GH84

1550 nm

40 MHz

2 mm

No

AMTIR

I-M040-2C8B1-3-GH84

1900-2100 nm

40 MHz

2 mm

No

AMTIR

STBR series free space AO Frequency Shifters

The STBR Free Space Acousto-Optic Frequency
Shifter (AOFS) with RF driver is used to modify the frequency of the
optical beam. Due to a Doppler shift, the frequency of the diffracted
first order optical beam in the AO modulator or AO frequency shifter is
shifted in frequency (wavelength) by the acoustic carrier frequency
(wavelength). If the incident acoustic wave is introduced in the
direction of the incident optical wave, the laser frequency shifts
towards the higher side. If the incident acoustic wave is introduced in
the opposite direction of the incident optical wave, the laser shifts
toward the lower frequency side.

Model #

Spectral Range (nm)

DE up
to (%)

Frequency Shift (MHz)

Active Aperture (mm)

Material

AMF-90-2-2.1

1000-2200

15

90

1.0

AM

AMF-55-1.3

1000-2200

80

55

2.0

AM

AMF-100-1.3

1000-2200

80

100

2.0

AM

GEF-40-10

2000-12000

75

40

2.0

Ge

GEF-60-1.5

2000-12000

75

60

1.5

Ge

GEF-80-20

2000-12000

70

80

1.0

Ge

GPF-250-100

590-1000

60

250

0.75

GaP

GPF-650-225

590-1000

50

650

0.18

GaP

GPF-1000-500

590-1000

40

1000

0.076

GaP

GPF-1500-1000

590-1000

10

1500

0.076

GaP

GPF-1700-500

590-1000

30

1700

0.076

GaP

IPF-200-50

1000-1600

40

200

0.75

InP

IPF-400-200

1000-1600

35

400

0.50

InP

IPF-600-200

1000-1600

30

600

0.18

InP

IPF-800-300

1000-1600

20

800

0.076

InP

IPF-1000-350

1000-1600

15

1000

0.076

InP

IPF-1300-400

1000-1600

10

1300

0.076

InP

LNF-2500-1000

400/830

20

2500

0.076

LiNBO3

LNF-3500-1000

400-630

5

3500

0.076

LiNBO3

QZF-80-20

200-4500

75

80

1.0

SiO2

QZF-150-30

200-4500

75

150

0.75

SiO2

QZF-210-40

200-4500

75

210

0.5

SiO2

TEF-200-50

400-1600

60

200

0.75

TEO2

TEF-270-100

400-1600

60

270

0.75

TEO2

TEF-540-200

400-1600

40

540

0.18

TEO2

TEF-600-400

400-1600

40

600

0.18

TEO2

TEF-1000-300

400-1600

40

1000

0.076

TEO2

TEF-1700-350

400-1600

15

1700

0.076

TEO2

For the associated RF drivers, please refer
to “RF Drivers for STBR series” through the link at bottom